Q10171501 - Can we directly install of ARC-12x4 with Ubuntu Server 14.04.1 LTS?

You have to firstly install the system into a separated drive, update raid card driver next, and then clone the system into a volume on ARC-1214. Kernel buildin driver supports ARC-12x4 since kernel version 3.18. Your ubuntu uses older kernel 3.13, the driver in this kernel does not support new 12x4 cards.